Calculating machine



July 28, 194.2. H. T. AVERY 2,291,133

CALCULATING MACHINE Original Filed Dec. 18, 1933 '7 Sheets-Sheet lINVENTOR Harold T Avery ATTORNEY July 28, 1942.

H. T. AVERY CALCULATING MACHINE Original Filed De '7 Sheets-Sheet 2INVENTOR Hora/0' T. Ave/y av ATTORNEY July 28, 1942. H. "r. AVERYCALCULATING MACHINE Original Filed Dec. 18, 1933 7 Sheets-Sheet 3 m .Y Mw -mfimHLr MM m T. W

m a y H. 'r. AVERY 2,291,133

GALCULATINGMAGHINE July 28, 1942.

7 Sheets-Sheet 4 Original Filed Dec. 18, 1933 Flt-5-5..

INVENTOR HQ Q' TA very ATTORNEY July 28, 1942. H. T. AVERY 2,291,133

CALCULATING MACHINE Original Filed Dec. 18, 1953 7 Sheets-Sheet 5 MiaINVENTOR Ham/d 7. Avery ATTORNFV July 28, 1942. H. T. AVERY 2,291,133

CALCULATING MACHINE Original Filed Dec. 18, 1933 '7 Sheets-Sheet 6 MFIE.1E

INVENTOR Harold TAver-y ATTORNEY July 28, 1942. AVERY Q I 2,291,133

CALCULATING MACHINE Original Filed Dec. 18, 195:5 7 Sheets-Sheet '7FIEJE- INVENTOR Hero/a TAve/y ATTORN EY Patented July 28, 1942 2,291,133CALCULATING MACHINE Harold T. Avery, Oakland, Calif., assignor toMarchant Calculating Machine Company, a corporation of CaliforniaOriginal application December is, 1933, Serial No. 702,949. Divided andthis application January 15, 1940, Serial No. 313,918

14 Claims.

This invention relates to a machine having a shiftable carriage and hasparticular reference to a calculating machine of the type used toperform the cardinal calculations, including division andmultiplication.

The invention is illustrated as embodied in a calculating machine of thetype disclosed and claimed in Patent Number 2,211,736, issued August 13,1940, on the copending application of Harold T. Avery, entitledCalculating machines, Serial Number 702,949, filed December eighteenth,1933, of which the present application is a division. Reference ishereby made to the above Avery patent for disclosure of a completecalculating-machine including mechanisms not specifically describedherein. It is to be understood, however, that although the invention isshown as applied to a machine of the general type disclosed in the abovepatent, the invention is also applicable to calculating machines ofother types.

Calculating machines of the type referred to above usually haveincorporated therein a stationary body portion and a laterally shiftablecarriage thereon carrying the various calculation registeringmechanisms. The carriage is shiftable either under automatic or manualcontrol to different positions in order to enable the actuators, undercontrol of certain selecting mechanism in the main body portion of themachine,

to actuate different orders of the registering mechanism.

The principal object of the present invention is to provide a machine inwhich the carriage may be automatically shifted ineither direction fromanyposition to any other pre-selected position.

Another object is to provide improved setting and operating means forsuch carriage shifting mechanisms.

Another object is to provide a machine in which the carriage can beautomatically traversed to a pre-selected position as an incident tothetermination of a calculation operation, such as a division ormultiplication operation.

Another object is to provide optional controls whereby the carriage maybe moved to a preselected position, either under manual control at anytime or automatically as an incident to the termination of amultiplication or division operation.

Another object is to provide means settable to indicate a given carriageposition and means for later initiating movement of the carriage to theindicated position without disturbing the indicating means, therebyobviating the necessity of resetting the indicating means if it isdesired to'again return the carriage to the indicated position.

Another object ,of the present invention is to provide improved meansfor shifting a carriage in either direction.

The machine of the present invention enables the operator to pre-selectany of a number of carriage positions and thereafter, either ontermination of a multiplication or division operation or on depressing atabulator key, the carriage will automatically return to thepre-selected position. This operation obviates the necessity for theoperator to direct his entire attention to the positioning of thecarriage after one calculation and preparatory to thenext calculation,as is necessary when the stopping of the carriage is determined bymanual release of a shift key just as the carriage reaches its desiredstarting position. Thus, in a machine embodying the present invention,the operator will be free to prepare the various selecting and controlkeys for the next calculation while the carriage is being automaticallymoved to itspredetermined starting position.

The manner in which the above and other objects of the invention .areaccomplished will be readily understood on reference to the followingspecification when read in conjunction with the accompanying drawings,wherein:

Figure l is a plan view of a calculating machine embodying the presentinvention and showing the keyboard, carriage, and the several controls.

Figure 2 is a sectional side elevation showing details of portions ofthe power operated mechanism utilized for shifting the carriage.

Figure 3 is a sectional view taken in part along the line 3-4 in Figure2, showing the construction'of, the shift unit and its connection to thecarriage.

Figures 4 and 5 illustrate details of the control mechanism for theshift unit. Y

Figure 6 is a sectional side elevation view illustrating the mechanismcontrolled by the tabulator key, and the carriage, for operating thecarriage shifting mechanism.

Figure '7 is a sectional side elevation view taken through the forwardportion of the machine and illustrating details of a portion of thetabulator controlling mechanism.

Figure 8 is a sectional view taken along the line 88 of Figure 'I andshowing the connection between the tabulator key and certain parts ofthe tabulator control mechanism.

Figure 9 is a sectional view taken along the line -9 of Figure 7,showing a portion of the tabulator mechanism.

Figure 10 is a sectional plan view taken through a portion of thetabulator control mechanism.

Figure 11 illustrates the details of construction of the dial assemblyassociated with the tabulator control knob.

Figure 12 is a plan view, with parts broken away, showing a ortion ofthe tabulator control mechanism in the frame of the machine, and therelation of this control mechanism to the carriage.

Figure 13 is a sectional side elevation view taken through the machineand illustrating the can'iage dipping mechanism and certain mechanismutilized in connection with the shifting of the carriage.

Figure 14 illustrates certain details of the mechanism utilized inconnection with the carriage dipping mechanism.

Figure 15 is a transverse sectional view through the carriageillustrating the mechanism for disconnecting the carriage from thecarriage shifting mechanism.

Referring to Figure 1, the calculating machine is shown as comprising akeyboard having a number of aligned rows of nu-meral keys I00. The keysI00 determine the amount entered by the actuating mechanism into thediil'erent orders of an accumulator register I0, provided in a shiftablecarriage 250, in accordance with the numerical values of the particularkeys I00 depressed.

Add and subtract bars 000 and 000, respectively, are provided forcontrolling such actuating mechanism (not shown) to add or subtract anamount set up in the various keys I00 to or from an amount set up in theregister 20",. while a division key 910 is .provided to control theactuating mechanism to divide an amount set up on the keys I00 into anamount appearing on the register 23I8. A stop key 085 is provided forarresting the operation of the machine in automatic division wheneverdesired. A row of multiplier keys M00 is arranged along the right handside of the machine to control the actuator mechachine.

Carriaae shifting mechanism Shifting of the carriage 200 is effectedfrom a driving motor (not shown) by a shift mechanism illustrated inFigures 2 to 5, inclusive. under control of a control member I000rockable on a shaft IO0I. Member I000 is rocked either clockwise orcounter-clockwise under manual or aulticlangatic control in a manner tobe described When member I000 is moved clockwise, an extension I002thereon is positioned in engagement with a toothed wheel I000 and thecarriage is shifted to the right. When member I000 is movedcounter-clockwise, it positions a point I000 thereon in engagement witha star wheel and the carriage is shifted to the left.

'll'e engagement of the toothed wheel I000 or of the wheel I000 by thecontrol member I000 results in the selective turning of a carriageshifting shaft 000 by power transmitted through the following mechanism.A gear 002 (Figure 3) continuously rotated by the driving motor (notshown) whenever the motor circuit is closed, is secured to a'shaft I000.which is journaled'in bearings provided in center .and right side frames020 and ,0", respectively. A sleeve I 000, also secured to the shaftI000, has mounted thereon a gear 000, driving certain related parts (notshown). A member I00 is suitably fixed to the sleeve I000 and has a pairof lugs formed thereon and extending into notches IOII formed in thegear 040 to provide a driving connection between this gear and shaft000.

nism to multiply an amount set up on keys I00 by an amount correspondingto the numerical value of the particular multiplier key depressed.

The manner in which the above mentioned actuating mechanism iscontrolled by the various control keys is described in detail in theabove mentioned patent. The keyboard also includes a tabulator key I500for initiating carriage movement to a position d termined by the settingof a tabulator knob I090, and a back space key I000 for initiating, whendepressed, a one step shift of the carriage to the right.

The carriage 200, in addition to its accumulator register 20I0,comprises a pair of counter registers I000 and IO0I aligned side byside, directly above the register 20I0, for the purpose of counting thevarious machine cycles and thereby displaying the quotient in divisionoperations and the multiplier in multiplication operations.

The carriage of the machine illustrated is movable in either directionto nine diflerent positions. However, the number of positions may beincreased or decreased as desired without affecting the mode ofoperation of the machine. The position of the carriage at any one timeis indicated by a stationary pointer I000 which. in the exampleillustrated in Figure 1, indicates A spider I000 is secured to the gear000 and sleeve I000 by riveting over the end of sleeve I000 upon whichthe spider I000 is fixed. Spider I000 has welded to one side thereof aninternal ring gear IOI0. Thisgear IOIl is in mesh with three planetarygears IOI0, each riveted to one end of a respective shaft IOIl. threesuch shafts being journaled in bearings IOI0 equi-spoced from each otherin a toothed wheel I000. The planetary gears IOI0 also mesh with asungear I020 formed upon one end of a sleeve I02I, which is rotatablymounted on a reduced portion of the shaft I000 and has the star wheelI000 suitably secured thereto. Planetary gears I022 are formed on theopposite ends of shafts II and mesh with,

axes to rotate the sun gear "21 and its associated gear I020. In thiscase, sun gear I020, sleeve I02I and star wheel I000 merely idle onshaft I000. If, however, the star wheel I000 is held by point I000 ofcontrol member I000, the sun gear I020 will be held stationary and theplanetary gears I3I6 and I322 will both rotate about their own axes andrevolve about the gear I321 driving the gear I324 in the oppositedirection. This selective reversal of rotation of gear I324 is utilizedto effect a shift of the carriage in either direction.

A gear I326 (Figure 3) is rotatably mounted on a hollow shaft I33Ibetween a cam I332 (Figures 3 and 5) and a spacer I330 keyed to saidshaft. A sleeve I333 (Figures 3 and 4) is also rotatably mounted on thehollow shaft and supports a cam I334 thereon, while a centralizer discI335 is keyed to the hollow shaft I33I. A spring I331 is compressedbetween a lock washer I338 and lock nuts I333 mounted on a threadedshaft I336 which is screwed into the hollow shaft I33I. Thisconstruction provides for a friction drive connection between gear I326and shaft I33I effected by cam I332 and spacer I330 which are keyed toshaft I33I and pressed against the gear I326 by spring I331 bearingagainst the lock washer I330, the centralizer disc I335, the spacerI333, and the cam I332.

The hollow shaft I33I is supported in a suitable bearing I340 providedin the supporting plate 524 of the machine. A mitre gear I34I is fixedon the end of the shaft I33I and meshes with a mitre gear I342 mountedon the lower end member is rocked clockwise or counter-clockwise toinitiate a carriage shift, the projection I353 will seat either under orabove the ear I354 on member I300 and therefore latch that member in itsdisplaced position.

Upon rotation of shaft I33I (see also Figure 4), lever I350 is moved bycam I334 to release the ear I354 at about the middle of the carriageshifting cycle. An arm I356 is secured to a bushing I345 pinned to shaftI35I.and includes an extension or nose I351 engaging the periphery ofcam I334 so that when this cam rotates, the lever I356 is moved in acounter-clockwise direction to engage an ear I358 on lever I350 and rockit to of the vertical shaft 334, rotatably supported in an angle pieceI343 secured to the base plate 2I5I of the-machine which also carries asleeve bearing I344 riveted to the angle piece, which bearing supportsan end of the hollow shaft I33I.

A plate 333 is secured to the upper end of shaft 334 and has a pair ofdiametrically opposed rollers 332 mounted on the upper surface thereof.Rollers 332 mesh with the teeth of a comb 330 (Figures 3, 12, and 15)supported at the rear of the carriage 250 and thereby shift the carriagetransversely on rotation of shaft 334.

It should be noted that the various teeth in comb 330 are spaced apartfrom each other a distance'equal to the spacing between each of the ninedifferent carriage positions. Thus, each half rotation of the shafts 334and I33I will shift the carriage from one operating position to thenext. To enable manual shifting of the carriage independently of theshifting mechanism, the comb 330 is pivoted on a shaft 33I (Figure 15)and is rockable out of engagement with the rollers 332 on the plate 33.The comb 330 has a slot formed in a vertical wall thereof, into whichslot a lug 339 formed on a lever 335 extends. The lever 335 is alsopivoted on the shaft 33I and extends through a slot in the carriagecover, terminating in a handle 336. The lever 335 is normally. held in araised position against a stop pin 338 by a tension spring 331 so as toposition the comb 330 in mesh with the rollers 332. However, when thehandle is depressed by the operator the comb 330 is raised away from therollers enabling the carriage to be moved sideways.

Spring means are provided to centralize the control member I300 into theposition shown in Figure 2, as will be described hereinafter, and, inorder to maintain the member I300 in displaced position until thecarriage has been shifted a full step, once a shift is initiated, thefollowing mechanism is provided.

A latch lever I350 (Figure 2) is pivot-ed on a shaft I35I and is urgedin a clockwise direction by a tension spring I352. When member I300 isin its centralized positionindicated in Figure 2, a projection I353 onlever I350 abuts an ear I354 formed on the member I300. However, whenthe release extension I354.

It is.to be noted that the cam I334 includes two opposite steeprisesover which the nose I 351 rides. Upon clockwise'rotation of the cam fromthe position shown in Figure 4, the nose I351 rides over one of theserises at about the middle of the cycle, while, if counter-clockwiserotation of the cam I334 took place, the arm I356 would be moved adistance suillcient to release the ear I354 early in the cycle. Tosecure the same cyclic time of operation of the lever I350. regardlessof the direction of carriage shift, the cam I334 is free on the sleeveI333, unaffected by spring I331 which presses disc I335 against the endof sleeve I333, and is driven by the centralizer disc I335 which iskeyed to shaft I33I. As appears in Figure 2, this disc I335 includes anelongated notch or depression I360 in which a roller I36I on cam I334 ismovable. Upon clockwise rotation of the centralizer disc I335 from theposition shown in Figure 2, roller I 36I on cam I334 is engagedimmediately by the adjacent edge of the notch I360 and the cam I334 isrotated. However, upon counter-clockwise rotation of the centralizerdisc I335, the roller I36I is engaged by the opposite side of the notchI360 of the disc I335 only after the centralizer has rotated nearly halfa, revolution so that the rocking of the arm I356 and disengagement ofthe ear I354 occurs at the same cyclic time in each case.

The centralizer disc carries two rollers I363 (Figure 2) against whichan arm of hell crank I364 bears under the pull of a spring I364A so asto centralize the drive unit as well as the carriage proper at the endof a carriage shift, providing, of course, the member I300 iscentralized at this time.

To further aid in maintaining the control member I300 in controllingposition until just before the end of a carriage step or shift, a leverI365 (Figures 2 and 5) is provided. Lever I365 is also mounted upon theshaft I35I and is pulled by spring I366 in a counter-clockwise directionso that its tail I361 rides against the periphery of cam I332. This camI332, which is keyed to the hollow shaft I33I, serves to rock the pointI363 on the lever I365 into and out of engagement with the shelf I354,the point lying either above or below the shelf depending upon thedirection of movement of the member I300. The lever I365 is moved in tohold the shelf I354 just before the projection I353 is pulled out andthus ensures that the clutch operation will continue. This lever I365 isrocked out just before the end of each individual shift cycle so thatmember I300 can be centralized to disengage the unit and the shift willend, unless the shift called for is a multi-order shift, in which eventmember I300 will be held in its displaced position by other meanshereinafter described.

The shifting mechanism is maintained in a neutralposition when notcalled on to shift the carriage by the following mechanism. Referring toFigures 2 and 6, the control member I340 is pivotally connected to alink I314, the other end of which is pivoted to the upper end of a leverI315 rockable about a shaft I315. Lever I315 is resiliently maintainedin a centralized position, to maintain the control member I344 in acentralized position, by a centralizing lever I4I0 which is pivoted atI4II on a stationary pin extending from the machine frame. Lever I4I0has an extension I4I4c normally in engagement with lever I315 aboveshaft I314 and a lower offset portion I4I0b normally in engagement withlever I315 below shaft I315. Lever I4 is urged in a counter-clockwisedirection by aspring I444 tensioned between a stationary pin I44I and anear I402 on the lever I4I4 so as to hold the lever I315 in the positionshown in Figure 6 whenever the various shift controlling mechanisms tobe described hereinafter are not in operative positions. The lever IIIis also providedwith extending flngers I4 I which [lie on opposite sidesof lever I315 and act as guides.

Tsnons'rmc Csaamcn San-r Cosraonnso Mncnsmsx Direction control Thedetails of the mechanism for controlling the direction and extent towhich the carriage moves upon depression ofthe tabulating key I504, orat the end of a division or multiplication operation, will now bedescribed. As appears in Figure 12, a Geneva crm I524 is mounted on ashaft I52I journaled in a bracket I522 on the left side frame 523 of themachine. Shaft I52I is connected by a flexible spring coupling I523 to ashaft I424 likewise icurnaled in brackets I525 on the side frame.Rotation of the shaft I524 is transmitted through another flexiblecoupling I524 to an angularly positioned shaft I521 Jour- Inaled inbrackets I524 on the side frame and bottom frame 2I5I of the machine toanother flexible connection I524 which is connected to a stub shaft I534(Figure 10) journaled in a bearing I534 on a vertical flange I544 of thebottom frame 2I5I of the machine. A gear I53I is secured to stub shaftI530. The. several flexible couplings are formed of springs wound overeach other in opposite directions and inserted into the shafts to whichthey are joined and wherein they are secured by set screws and sweating.

The Geneva cross I524 (Figure 12) engages a rack I532 which is fixed tothe carriage along the left hand rear side thereof, each step ofmovement of the carriage from one position to the next causing a ninetydegree rotation of the Geneva cross. This results in a quarter rotationof the gear I53I and its shaft I534 (see also Figure 10) in thesupporting bearing I534. Rotation of gear I53I also rotates a gear I534meshing therewith, which is fixed to a sun gear I431 (Figure 10) formedon a shaft I534. -This shaft I534 is journaled at one end in a memberI534 riveted to the flange I540 and at the other end in one end of ashaft I54I. Rotation of the sun gear I531 causes rotation of dualplanetary gears I542 and I543 to rotate a ring gear I544, revolution ofthe planetary gear support being prevented except during manual setting.The planetary gears are disposed on opposite ends of a shaft iournaledin a plate I545, secured on shaft I54I, rotatably mounted in asupporting bearing I544 so that it can be set to any desired position byknob I494,

which is utilized to predetermine the position to which the carriage isto return, but will otherwise remain fixed.

The ring gear I544 issecured to a spider I548 (see also Figure 9) havingan extension I549. This extension is provided with a pin I550 which, asthe spider is rotated, moves around the inner periphery of a memberI55I, pivotally mounted by means of stud I553 in bushing in front framemember 2I5'I. H

In that position shown in Figure 9, the pin I550 is seated in a notchI552 in member I55I, this position corresponding to that which the partsoccupy when the carriage is in the position corresponding to thecarriage position indicated by the setting of knob I499.

As shown in Figures 10 and ii, the knob I499 is fixed to shaft I54I andis manually adjustable into nine different rotational positions. For thepurpose of holding shaft I54I in any selected position a ratchet memberI554, keyed to shaft I54I. is engaged by a roller I553 mounted on alever I55I, pivoted at I552 to the frame member 2IOI. Roller I553 ispulled into any one of nine equispaced notches in member I544 by aspring I555 to hold the shaft in any adJusted position. A dial I550keyed to shaft I54I carries numerals I555, visible through an openingI551 (Figure l) in the cover I I5 of the machine so that the setting ofthe tabulator may be readily noted.

The mechanism whereby the knob I499 revolves the planetary gears I542and I543 to any of a series of radial stations about shaft I54Iconstitutes a means for forming a series of mechanical representationscorresponding to the respective positions of the carriage, because ineach of the radial positions, or stations, to which these gears may beset, the mechanism controlled thereby will cause the carriage to bearrested when it reaches a different position corresponding to thesetting of the gear positioning mechanism.

From the above it will be readily understood that the pin I550 will bedifferentially moved to either side of its position shown in Figure 9 inaccordance with both the carriage position at an one time and thesetting of knob I449. Thus, when the carriage 250 moves to the left of aposition indicated by the setting of knob I499, the pin I554 rocks outof notch I552 and in a counterclockwise direction about shaft I54 I Thismotion of pin I554 causes it to rise against the upper inner peripreryof lever member I55I and thus cause that member to rock clockwise on itssupporting stud I553. Likewise, when the carriage 250 moves to the rightof a position indicated by the setting of knob I444, the pin I550 willcause the lever member to rock counter-clockwise from the position shownin Figure 9.

The tail of member I55I is bifurcated (Figure 9) to receive one end of alever I554 pivotaliy supported on a pin I555 (Figure 7) and whichcarries a stud I554 lying in a slot in a lever I5I0. Lever I5" isrockable about a shaft I5I I to either side of the medial position shownin Figure 7 and forms a direction control member to determine thedirection of the carriage shift when such takes place. That is, thelever I4I0'is positioned on one side or'the other of its medial positiondepending on whether the position of the carriage is to one side or theother of the carriage position indicated by the knob I449.

Member I5I4 has a T-shaped slot I5I2 therein, the lowermost portion orstem of which is disposed substantially vertically when the member is inits medial position. A pin I5I3, mounted on a link um pivoted at m1 to.5. 1m ma free on a shaft I418, extends into the slot l5l2 and normallyrides in the upper portion thereof when the tabulator shift isinoperative due to a spring I550 which raises the forward end of linkI5I0.

- to the right, as viewed in Figure '1, depending on the position oflever I5I0 at that time.

Such movement of link I5I0 initiates operation of the carriage shiftingmechanism to shift the carriage in one direction or the other accordingto the direction of movement of said link. Referring to Figures 6 and 7,a link I413 is also plvotally connected at one end thereof to the pinI481 and has a notch I414 at the other end thereof, normally held inengagement with the lower end of the carriage shift lever I315(previously described in connection with the carriage shiftingmechanism) by means of a link 1410 pivotally connected between link I413and a bell crank I025 supported on a shaft 010. Thus, if the lever I5I0is positioned clockwise of it medial position when the tabulating shiftoperation is started by depressing the forward end of link I5I0, theshift control lever I300 will likewise be moved clockwise to institute ashift of the carriage to the right, and if lever I5I0 is positionedcounter-clockwise of its medial position at such time a shift to theleft will be instituted.

Actuation Describing first the manual actuation of the tabulating shiftcontrols, the tabulator key I500 (Figure 6) is molmted upon a stem IIsupported by a pin I502 in a slot in the key stem and by a lever I503pinned toa shaft I410 (Figures 6, '1, and 8) to which it is pivotallyconnected.

and the right side frame 0I0 and carries there- This shaft extendsthrough the center frame 534 and the right side frame 0I0 and carriesthereon, adjacent the center frame, a member I504 (Figure 7) which ispinned to the shaft. Freely supported upon the shaft I410,adjacentmember I504, is a member I411 provided with a tail I505 carryinga roller I500 overlying lever I5I0. The member I504 and the member.I411, respectively, include noses extending toward each other andretaining a strong compression spring I501.

. Member I504 includes a shelf I500 which extends beneath the tall I505to prevent over extension of the spring I501. Movement of member I504 byshaft I410 is transmitted to the member I411 through the spring I501 sothat the roller I503 will be depressed upon depression of the tabulatorkey I500 rocking lever I5I0 on pivot I401 to depress the pin I5I3 oflever I5I0 into the. stem of the T-slot I5I3 in lever I5I0 and thusinstitute the carriage shift.

Means are providedyfor latching the parts in this position to maintainthe shifting mechanism in operation even though the operator may removehis finger from the key I500. The lever I5I0 includes an extension I514carrying a pin I5I5 which engages a nose I5I5 on the lever I5I1. LeverI5I1 is pivotally supported by a pin I5I0 and is pulled by a spring sothat its nose I5I0 engages the pin I5I5. Depending upon whether thecarriage is to the left or to the right of the desired position, the pinI5I5 will lie either above or below the nose I.5l6 omit the carriage isin the position called for by the tabulatin setting mechanism, it willstand against the nose as appears in Figure '1. If the pin I5I5 is abovethe nose I5I5, the pin I5I3 will ride down the left hand side of theT-shaped slot l5l2 upon depression of the key I500 and the link I413will be moved to the right. If the pin I5I5 is below the nose I5I5, thepin I5I3 will ride down the right hand side of the notch I5I2 and thelink I413 will be moved to the left as is shown in F ure '1.

In either case, the latch end of lever I5I1 will be pulled intoengagement with the upper side of the stud which carries the rollerI500, thereby holding the tail I505 and lever I5I9 depressed. Movementof the carriage thus initiated carries it toward a positioncorresponding to the setting of knob I400, and operation of the shiftingmechanism is automatically terminated when the carriage arrives in thatposition. Pin I550 (Figure 9) is returned toward notch I552 in member I!by such carriage movement, and when the pin enters this notch it tendsto return member I55! to the medial position 'in which the latter isshown in Figure 9. although the entire linkage comprising member I55I,lever I554, lever I5I0 (Figure '1), lever I5I9, link I413, lever I315(Figure 6) and link I314 will be held displaced until near the end ofthe current shift cycle by the shift control member I300 which i held indisplaced position until the end of the shift cycle by the levers I350and I365 as previously described. Atapproximately theend of the currentshift cycle, however, levers I355 and I350 release member I300, andcentralizer I4I0 pulled by spring I400 returns the entire linkage systemdescribed above, as well as member I300, to medial position, terminatingoperation of the shift mechanism.

When lever I5I0 returns to its medial position shown in Figure 1, due tothe movement of the carriage 250 into a position corresponding to theindicated carriage position of knob I499, the pin l5l5 thereon will rocklever I5I1 to release the stud on which roller I500 is mounted.Retraotion of roller I505 enable the tabulator key I500 to be raised byits spring I50Ia .to its inoperative position. I

The automatic initiation of the tabulating shift mechanism as anincident to termination of a multiplication or division calculationoperation will now be described.

Normally, during division and multiplication operations, except when thecarriage is in its extreme left end position, an automatic shift of thecarriage one step to the left is instituted at the completion of thecalculation in the partic- 'ular order in which the carriage ispositioned.

means disclosed in detail in the above Avery application and which willbe described hereinafter. Link I811 has an upwardly turned end I818, adownwardly turned end I880, and-is pivotally mounted intermediately by apin I818 on a lever I880. The lever I880 is pivotally supported on ashaft I88I mounted in the frame of the machine while a spring I882 isprovided between an extension of the lever I880 and link I811 to pullthe link I811 counter-clockwise. Lever I880 is pivoted at the upper endthereof to a dog I888 having a shoulder formed thereon which is normallyin engagement with an ear I888 on the link I814, except when thecarriage is in its left end position. The dog I888 has an elongated slotI818 therein which rides over a pin I814 formed on an arm of a leverI812, pivotally mounted in the frame of the machine, which lever isnor-' mally held in the position illustrated in Figure 6, except whenthe carriage is in its left end position.

The right hand end of link I811 has the nose I888 thereof normallypositioned below and against an extension I888 of an actuating memberfor moving the link I 811.

At the beginning of the division or multiplication operation in any oneparticular carriage order the extension I888 is moved to the rightenabling the spring I882 to position the nose I888 of link I811 againstthe left hand edge of this extension I888. At the end of the operationin the particular carriage order the extension I888 moves to the left tolikewise move link I811 to the left and, since the dog I888 is inengagement with the ear I884 of link I818, the shift control member I808will be rocked counterclockwise through the link I818 and thus engageits point I804 with the star wheel I808 (Figure 2) of the carriageshifting mechanism and start a shift to the left. To insure a singlestep of movement of the carriage the link I811 is rocked clockwiseagainst the action of the spring I882 by suitable means (to be describedlater) during the shifting operation and thereby move the nose I888 oflink I811 under the extension I888 as shown in Figure 6. I

As the carriage is shifted into its left end position a nose I810(Figure 6) on the right hand end of carriage 280 engages a beveled noseI81I on lever I812 to rock that lever in a counter, clockwise directionabout its supporting shaft I888 against the tension of spring I818. Thecounter-clockwise rotation of lever I812 raises the dog I888 to removethe bottom shoulder thereof from against ear I888 on link I814 and bringan upper shoulder I811 of dog I888 into engagement with a shelf I818 ona lever I818 pinned to a shaft I880. Thereafter, on leftward movement ofextension I888 as an incident to the termination of the calculation inthe last carriage order (as described hereinbefore) dog I888 is rockedto shift the lever I818 to the left so that shaft I580 is rocked in aclockwise direction. This results in clockwise movement of a lever I88Ialso pinned to shaft I880 and a movement to the left in Figure 6 of alink I882 against the pull of a spring I 888. Link I882 is connected bya pin and slot connection I888 to a lever I888 pinned to shaft I818, asappears in Figure 8, so that the shaft I818 is rocked and the sameaction instituted as if the tabulating key I800 had been depressed. Thisresults in the carriage being moved to that position determined by thetabulating-setting mechanism.

-mechanism depending on the AU'rouA'rIc CARRIAGI Smrr Corrrnor. DunnoDrvrsros AND Mormucnron As described hereinbefore, the carriage shiftinitiating link I811 (Figure 6) is moved to the left as an incident tothe termination of a division or multiplication operation in eachcarriage position so as to move the dog I888 leftward and therebyinstitute either a carriage shift to the left or actuation of thetabulating shift control position of the carriage 280.

Although any means .may be employed to actuate link I811 the followingmechanism, disclosed in the above Avery application, is preferablyemployed.

Referring to Figure 13, the carriage has a series of aligned plates, oneof which is shown at 288, all connected at their rear ends to a bail 288and supported at their forward ends for pivotal movement on a shaft 282.Three shafts 210, 212, and 828 are supported by the plates 268 and formpart of the accumulator register 28I8. A pair of gears 218 and 21I,meshing with each other, are mounted on the shafts 210 and 212,respectively, in each order of the register, each gear 218 driving arespective dial shell 218. A pawl 8I8, rockably mounted on shaft 820, isprovided in each order and is urged by a spring 8 into engagement withthe teeth of the respective gear 21I to hold that gear stationarywhenever it is not actuated by an actuator gear I88. Each shell 218 hasa series of numerals from "zero" to nine" spaced around the peripherythereof, one of which is always visible through an opening formed in thecover of the carriage 280. The various dial shells in the differentorders of the register 28I8 are connected together through suitabletens-carrying mechanism (not shown).

At the beginning of a calculation operation, such as multiplication ordivision, the bail 288 is dipped to mesh the gears 21I with respectiveactuator gears I88 which are mounted on sleeves I88 journaled on a shaftI10. Thereafter, the actuator gears I88 are rotated diflerential amountsin a manner described in the above mentioned application. After theconclusion of rotation of the gears I88, the gears 21I, havingtransmitted a certain rotation to the dial shells 218, are raised out ofmesh with gears I88, and, in the case of multiplication or division, thecarriage is automatically shifted to the left one step preparatory tocontinuation of the problem.

The means for dipping the carriage, from that position in which itappears in Figure 13, to bring gears 21I into mesh with gears I88 andthen rollers 818 in engagement with cams 818 keyed on a shaft I so thatthe links 888 are positively pulled down by rotation of shaft I.

Means are provided for latching the carriage in raised position when theaccumulator is not in operation and during shifting operations, and forlatching the carriage in its lower position during engagement of gears21I and I88. This means includes a latch lever 818 in the form of a bellcrank pivoted at 818 and having a nose 811 formed at the upper endthereof to engage the in its raised position.

. To disengage the latch levers 515 and permit lowering of the carriageupon beginning of a setting clutch operation (not shown) preparatory toa calculation operation, as well as to latch the carriage in its lowerposition, means are provided to move levers 515 and so rock their noses511 out of engagement with the lower edges of extensions 518, and backinto engagement with the upper edges thereof. A lever 588 is secured toa shaft 58I in position to be engaged by an extension 582 on a plateindicated by dot-dash lines 552 rockable on shaft 225 (Figure 13) sothat rocking of plate 552 by reverse cams 558 and 55I, keyed on shaft 43I, also rocks shaft 58I, to which rocking arms 583 and 584 are attached.Arm 583 is connected to levers 515 by pivotal connections 585 so thatwhen the levers are thus rocked, the links 555 are not held by noses 511and cams 514 may then lower the plates 255 to engage the gears 21I withthe actuator gears I88. As the gears I" are moved into mesh with thegears I88, cams 558 and 55I, by rocking plate 552 permit springs 518 topull the latch levers 515 counter-clockwise to reengage noses 511 overextensions 518.

Pawls 28I, normally in engagement with the gears I88 when the gears 21Iare raised, are released from the blocking of gears I88 when gears 282to which is also keyed a lever 585 slotted to receive a pin 581 providedon an upwardly extending arm 588 formed on the rocking cam lever 518. Asan incident to termination of rotation of the various actuator gearsI88, a sleeve 584, rotatably mounted on a shaft 585 is rotated by arestore clutch 188. A cam 583 (Figure 14) secured on the sleeve 584 isthus rotated. This cam rocks a lever 58I clockwise about a shaft 588 tomove lever 584 and so rock shaft 58I and levers 515 to release thelatched-down carriage.

The sleeve 584 carries another cam 585 (Figure 13) which is employed toprevent the carriage from rising too rapidly. A lever 581, hinged on ashaft 588, bears against cam 585 and against a lever 588 keyed to ashaft 588. Levers 58I are also keyed to this shaft and joined by pin andslot connections 582 to the links 555 so that the rate of rise of thelinks 555 under the pull of spring 558 is no greater'than'that permittedby cam 585.

As the cam lever 518 is rocked counter-clockwise due to raising of thelinks 555 as an incident to the termination of the calculation in theparticular carriage order, the extension I385 on lever 518, whichextension is now to the right of the nose I385 of link I311, will engagethat link and shift it to the left, thereby instituting a shift of thecarriage 358 to the left unless-it is in its leftmost position.

To ensure that the carriage shift is limited to a single step, leverI311 is rocked clockwise and is disengaged from extension I385, duringthe carriage shift. It will berecalled that during the carriage shiftoperation cycle, cam I334 operates to move lever I355 (Figures 4 and 6)in a counterclockwise direction to remove lever I358 from engagementwith extension I354 on the shift control member I388. Movement of thelever I355 also rocks a bell crank lines I381 (Figure 6) clockwise abouta shaft I388 so that a shelf I388 thereon, which lies beneath indicatedby the dot-dash the link I311, rocks link I311 clockwise about the pinI318 to release its nose I385 from extension I385. The shift controlmember I388 is thus freed from the restraint of extension I385 and canbe released and centralized at the end of a single cycle of operation.During the first cycle of operation of the shifting mechanism, in thecourse of an automatically initiated tabulation operation, the samemechanism frees member I811 from lug I385 to permit key I588 to rise atthe end of the operation.

I claim:

1. m a machine of the class described having a frame, a carriagetransversely shiftable thereon to any of a series of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein synchronism with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingdevices settable to any of a series of positions, each positioncorresponding to one of the respective operating positions of thecarriage; direction control means including an element selectivelysettable jointly by said member and said devices upon setting movementsof said carriage position mechanism and said tabulation control means oreither of them, to control the direction of operation of said carriageshifting mechanism; and means controlled by said element, and operableafter the same has been 21I are lowered. Pawls 28I .are keyed on a shaft4 of the carriage;

selectively set, for selectively initiating operation of said carriageshifting mechanism to cause shifting of the carriage in one other inaccordance with the setting of said element.

2. In a machine of the class described having a frame, a carriagetransversely shiftable thereon to any of a series of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein synchronism with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingmechanism manually settable to indicate any of a series of opcratingpositions of said carriage, and devices adjustable by said mechanism tocorrespondence with such indication; direction control means includingan element selectively settable jointly by said member and said devicesupon setting movements of said carriage position mechanism and saidtabulation control means or either of them, to control the direction ofoperation of said carriage shifting mechanism; and means controlled bysaid element, and operable after the same has been selectively et, forselectively initiating operation of sad carriage shifting mechanism tocause shifting of the carriage in one direction or the other inaccordance with the setting of said elemen 3. In a machine of the classdescribed having a frame, acarriage transversely shiftable thereon toany of a series of operating positions, and motor driven means forshifting said carriage; the combination of carriage position mechanismincluding a member settable in synchronism with said carriage to aposition corresponding to the position occupied by said carriage;tabulation control means including devices settable to any of a seriesof positions, each position corresponding to one of the respectiveoperating positions direction control means including an elementselectively settable jointly by said member and said devices uponsetting movedirection or the ments of said carriage position mechanismand said tabulation control mean or either of them,

to control the direction of operation of said carriage shiftingmechanism; means controlled by said element, and operable after the samehas been selectively set, for selectively initiating operation of saidcarriage shifting mechanism to cause shifting of the carriage in onedirection or the other in accordance with the setting of said element,and means responsive to said member and devices upon adjustment; thereofto correspondence, for arresting operation of said carriage shiftingmechanism.

4. In a machine of the clas described having a frame, a carriagetransversely shiftable thereon to any of a series of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein ynchronism with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingdevices settable to any of a series of positions, each positioncorresponding to one of the respective operating positions v of thecarriage; direction control means including an element selectivelysettable Jointly by said member and said devices upon setting movementsof said carriage position mechanism and said tabulation control means oreither of them, to control the direction oi operation of said carriageshifting mechanism; means controlled by said element, and operable afterthe same has been selectively set, for selectively initiating operationof said carriage shifting mechanism to cause shifting of the carriage inone direction or the other in accordance with the setting of saidelement, and means responsive to said direc-,

tion control means for arresting operation of said carriage shiftingmechanism.

5. In a machine of the class described having a frame, a carriagetransversely shiftable thereon to any of a series of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein synchronism with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingdevices settable to any of a series of positions, each positioncorresponding to one of the respective operating position of thecarriage direction control means including an element selectivelysettable Jointly by said member and said devices upon setting movementsof said carriage position mechanism and said tabulation control means oreither of them, to control the direction of operation of said carriageshifting mechanism; means controlled by said element, and operable afterthe same has been selectively set, for selectively initiating operationof said carriage shifting mechanism to cause shifting of the carriage inone direction or the other in accordance with the setting of saidelement, latch mean for maintaining said carriage shifting mechanism inoperation after initiation of the operation thereof, and meansresponsive to said member and said devices upon adjustment thereof tocorrespondence, for rendering said latch mean ineflective.

6. In a machine of the class described having a frame, a carriagetransversely shiftable thereon to any of a series of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein symchronism by said mechanism with said carriage to a positioncorresponding to the position occupied by said carriage: tabulationcontrol means including devices settable to any of a series 'ofpositions, each position corresponding to one of the respectiveoperating positions of the carriage; direction control means includingan element selectively settable jointly by said member and said devicesupon setting movements of said carriage position mechanism and saidtabulation control means or either of them, to control the direction ofoperation of said carriage shifting mechanism; means controlled by saidelement, and operable after the same has been selectively set, forselectively initiating operation of said carriage shifting mechanism tocause shifting of the carriage in one direction or the other inaccordance with the setting of said element, latch means for maintainingsaid carriage shifting mechanism in operation after initiation of theoperation thereof, and means responsive to said direction control meansfor rendering said latch means inefl'ective. '7. In a machine of theclass described having a frame, a carriage transversely shiftablethereon to any of a series oi operating positions, and

motor driven means for shiftingsaid carriage; the combination ofcarriage position mechanism including a member settable in synchronismwith ber and said devices upon setting movements of said carriageposition mechanism and said tabulation control means or either of them,to control the direction of operation of said carriage shiftingmechanism; means controlled by said element, and operable after the samehas been selectively set, for selectively initiating operation of saidcarriage shifting mechanism to cause shifting of the carriage in onedirection or the other in accordance with the setting of said element,and means responsive to said member and devices upon adjustment thereofto correspondence, for arresting operation of said carriage shiftingmechanism.

8. In a machine of the class described having a frame, a carriagetransversely shiftable thereon to any of a series. of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein synchronism with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingmechanism manually settable to indicate any of a series of operatingpositions of said carriage, and devices adjustable to correspondencewith such indication; direction control means including an elementselectively settable Jointly by said member and said devices uponsetting movements of said carriage tuhrltiothln controtlianrileans oreither of them, to cone direc of operation of said carriage shiftingmechanism; means controlled by said element, and operable after the samehas been selectively set, for selectively initiating operation of saidcarriage :shifting mechanism to cause shifting of the carriage in onedirection or the other in accordance with the setting of said positionmechanism and said tab-- element, and means responsive to said directioncontrol means for arresting operation oi. said carriage shittingmechanism.

9. In a machine of the class described having a frame, a carriagetransversely shiftable thereon to any of a series or operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein synchronlsm with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingmechanism manually settable to indicate any of a series of operatingpositions of said carriage, and devices adjustable by said mechanism tocorrespondence with such indication; direction control means includingan element selectively settable jointly by said member and said devicesupon setting movements 'of said carriage position mechanism and saidtabulation control means or either of them, to control the direction ofoperation of said carriage shifting mechanism; means con-= trolled bysaid element, and operable after the same has been selectively set, forselectively ini= tiating operation of said carriage shifting mechanismto cause shifting of the carriage in one direction or the other inaccordance with the setting of said element, latch means for maintainingsaid carriage shitting mechanism in operation after initiation of theoperation there= of, and means responsive to said member and saiddevices upon adjustment thereof to correspondence, for rendering saidlatch means in efiective.

1c. in a machine of the class described having a frame, a carriagetransversely shiitable thereon to any or a series of operatingpositions, and motor driven means for shifting said carriage; thecombination of carriage position mechanism including a member settablein synchro with said carriage to a position corresponding to theposition occupied by said carriage; tabulation control means includingmechanism manuall settable to indicate any of a series of operatinpositions of said carriage, and devices adjustable by said mechanism tocorrespondence with such indication; direction control means includingan element selectively settable jointly by said mem= her and saiddevices upon setting movements oi said carriage position mechanism andsaid tabulation control means or either of them, to control thedirection of operation of said carriage shitting mechanism; meanscontrolled by said element, and operable after the same has beenselectively set, for selectively initiating operation of said carriageshifting mechanism to cause shifting of the carriage in one direction orthe other in accordance with the setting or said ele ment, latch meansfor maintaining said carriage shifting mechanism in operation afterinitiation of the operation thereof, and means responsive to saiddirection control means for rendering said latch means ineffective.

11. In a motor driven calculating machine hav= ing a carriagetransversely shiitable to any oi a series of. operating positions,cyclically operable motor driven mechanism operable to shift saidcarriage between adjacent operating. positions thereof, and divisioncontrol devices for auto= matically controlling said machine in divisioncomputations comprising a manually operable member for initiating theoperation, and means for terminating the operation: means forautomatically controlling operation of said carriage shifting mechanismas an incident to the com .pletion of said division operation comprisingthe combination of means controlled by said division terminating meansupon operation thereof for initiating operation of said carriageshifting mechanism, said last mentioned means including a settablemember movable to a set position by said division terminating means uponoperation thereof; spring means for moving said member from set positionto interrupt the operation of said carriage shifting mechanism at theconclusion of any cycle of operation thereof, holding means forpreventing operation of said spring means, and means controlled by saidcarriage for releasing said spring means from restraint of said holdingmeans 12. In a motor driven calculating machine having a carriagetransversely shiftable to any of a series of operating positions,cyclically operable motor driven mechanism operable to shift saidcarriage between adjacent operating positions thereoi, and divisioncontrol devices for automatically controlling said machine in divisioncomputation comprising a manually operable member for initiating theoperation, and means for terminating the operation; means forautomatically controlling operation of said carriage shifting mechanismas'an incident to the com pletion of said division operation includingthe combination of means controlled by said division terminating meansupon operation thereof for initiating operation of said carriageshifting mechanism, said last mentioned means including a settablemember movable to a set position by said division terminating means uponoperation thereof; spring means tor moving said member from set positionto interrupt the operation of said carriage shifting mechanism at theconclusion of any cycle of operation thereof, holding means forpreventing operation of said spring means, means selectively adjustableto form a mechanical representation corresponding to any of therespective operating positions of said carriage, and means jointlycontrolled by the carriage and said selectively adjustable means forreleasing said spring means from the restraint of said holding means.

13. In a motor driven calculating machine having a carriage transverselyshiftable to any of a series of operating positions, cyclically operablemotor driven mechanism reversibly operable to shift said carriage ineither direction between adiacent operating positions thereof, means forinitiating operation of said carriage shifting mechanism including aconnecting member movable to either of two settings to control operationof said carriage shifting mechanism to shift said carriage in eitherdirection, means normally positioning said member in one of saidsettings to control operation of said carriage shifting mechanism toshift said carriage in one direction, and division control devices forautomatically controlling said machine in a division computationcomprising a manually operable member for initiating the operation,means for operating said carriage shift initiating means, and means forterminating the division operation; means for automatically controllingoperation of said carriage shifting mechanism to shift said carriage inthe opposite direction as an incident to said division operationcomprising the combination of means for initiating operation of saidcarriage shifting mechanism to shift-the carriage in the oppositedirection including a settable member movable to set position, meansincluding said settable connecting member movable to the other of saidsettings thereof for moving said settable member to set position, saidsettable connecting member being movable into the other of said uponoperation thereof; spring means for moving said settable member from setposition to interrupt the operation of said carriage shifting mechanismat the conclusion of any cycle of operation thereof, holding means forpreventing operation of said spring means, and means controlled by saidcarriage for releasing said spring means from restraint of said holdingmeans.

14. In a motor driven calculating machine having a carriage transverselysbiftable to any of a series of operating positions, cyclically operablemotor driven mechanism reversibly operable to shift said carriage ineither direction between adjacent operating positions thereof means forinitiating operation of the carriage shifting mechanism including aconnecting member movable to either of two settings to control operationof said carriage shifting mechanism to shift said carriage in eitherdirection, means normally positioning said member in one of saidsettings to control operation of said carriage shifting mechanism toshift said carriage in one direction, and division control devices forautomatically controlling said machine in its division computationcomprising a manually operable member for initiating the operation,means for operating said settings by said division terminating mechanismcarriage shift initiating means, and means for terminating the divisionoperation; means for automatically controlling operation of saidcarriage shifting mechanism to shift said carriage in the oppositedirection as an incident to said division operation comprising thecombination of means for initiating operation of said carriage shiftingmechanism to shift the carriage in opposite direction including asettable member movable to set position, means including said settableconnecting member movable to the other of said settings thereof formoving said settable member to set position, said settable connectingmember being movable into the other of said settings by said divisionterminating spring means for moving said settable member from setposition to interrupt the operation of said carriage shifting mechanismat the conclusion of any cycle of operation thereof, holding means forpreventing operation of said spring means, means selectively adjustableto form a mechanical representation corresponding to any of therespective operating positions of said carriage, and means Jointlycontrolled by the carriage and said selectively adjustable means forreleasing said spring means from the restraint of said holding means.

HAROLD T. AVERY.

